"Let's begin the training." Lily declares, placing her cock right in front of his face.
Harry's eyes followed the fat cock that was twitching right before his face, unable to grasp the sheer size of it.
"Now, I want you to please me with your hands, sweetie," Lily whispers into Harry's ear seductively.
He glanced up at her face, feeling uncertain. He says, "Uh, d-do you want me to finger you as you did to me?"
Lily laughed heartily and said, "No, to please a woman, you have to start by grasping her cock. Why don't you do that, sweetie?"
Harry hesitated for a moment before carefully reaching up to touch her, feeling the incredible heat the pulsing cock was radiating. The skin was smooth and soft, yet underneath, she was hard as steel.
"Just like that, Harry." Lily encouraged, her voice significantly huskier now.
"Try rubbing it with your hands." She instructed, cupping one of his hands and guiding him, making him jerk her off slowly.
Harry marvelled at the feel of her skin gliding over the hard shaft, feeling her heartbeat radiate in his palm. A clear drop of fluid leaked out from the tip, slowly gliding down the fat mushroom head.
"Now," Lily shuddered, "remember, it was a sub's duty to clean the fluids that come out of a cock?"
Lily then raised an eyebrow, staring pointedly at her leaking tip, making him realize what she wanted.
"Oh, right." He mumbled, slowly leaning forward and carefully licking up the leaking precum.
Lily moaned at both the feeling of his hot, wet tongue, as well as the vision of the boy licking on her fat cock like it was a lollipop. In response, her cock pumped out even more precum, forcing Harry to constantly lick and swallow the cum to keep up.
"Now, for the first part of the training, you will learn how to give a blowjob. It is something your partners expect you to do." Lily says that while Harry continues to lick her cock.
Harry then kisses the tip inside and swirls his tongue around her tip, making her moan in surprise.
"It would be much easier for you to," Lily gasped at the feel of his agile tongue, "place the entire thing inside your mouth."
"You think?" He asked.
"Yes, it's also an important skill for you to learn; girls will expect you to do that for them." She encouraged.
"They will expect this?" He questioned.
Annoyed with how much he kept delaying it, Lily grabbed his head, forcing him to meet her eyes.
"Yes, they will. Now I understand this is quite new to you because I can't exactly expect you to be familiar with all magical customs, but you need to stop questioning everything and do as you're told."
Harry's eyes widened at her stern tone before agreeing with what she was saying.
"Sorry." He muttered.
Lily ignored that, instead pushing her pulsing tip against his lips.
"Good, now open wide and start learning like a good boy."
There was no hesitation this time as he parted his mouth, letting her push the thick, glistening tip past his lips. Her musky precum instantly flooded his mouth, coating his tongue with her taste before being dutifully swallowed down.
"Good, now make sure to use your tongue a lot to tease the tip, Harry, and don't forget to close your lips around it so that you can suck on it like a lollipop while doing it."